The main worlds in the first generation Spyro the Dragon games are what make up the universe of the Final Fantasy games, where each world (Spira, Ivalice, etc.) is inside of a portal that takes place in a 'main world' (one like Avalar, for example) that hasn't been seen in any of the games themselves. And within that main world, something goes wrong with the dragon magic, and the main party of Final Fantasy XII is forced into the Spira portal, where Sin has returned (like in that awful Final Fantasy X -Will- audio drama) - which is also related to the dragon magic fail problem.

Then Yuna and Ashelia - two leaders in their own rights, go full on badass, with Yuna even ditching the White Mage persona for a Dark Knight one, and shit goes down.